Incandescent lamp.



f UNITED STATES Patented January 3'1, 1905.

PATENT OFFICE.

ALMON D. PAGE, OE NEWARK, NEW JERSEY, AssIGNOR To GENERAL ELEOTRIO COMPANY, A CORPORATION OE NEW YORK.

- INCANDESGENT LAMP.

SPECIFICATION forming part of Letters Patent No. 7181,016, dated January 31, 1905.

Application filed March 18, 1904:. Serial No. 198,759..

T all whom/zit 711/003/ concern:

Be it known that I, ALMON D. PAGE, a citi- Zen of the United States, residing at Newark, county ofjEssex, State of New Jersey, have invented certain new and useful Improvements in Incandescent Lamps, of which the following is a specification.

My present invention relates to incandescent lamps having straight filaments, and comprises certain improvements for taking up the slack of the filament as it expands or contracts during heating and cooling.

The features of novelty of my invention are pointed out with particularity inthe appended claims. The invention itself, however, will be better understood by reference to the following description, taken in connection with the accompanying drawings, in which-v Figure 1 represents one embodiment of my invention, and Fig. 2 a modification.

In Fig. 1 the exhausted envelop of the lamp consists of a straight glass tube 1. tube is located astraight filament 2, of any suitable material, which filament is electrically connected to leading-in conductors located, respectively, at opposite ends of the tube. .The upper end of the filament is connected directly, as shown, to the leading-in conductor 3, while -`the lower end of the, filament is electrically connected, through the iiexible coiled conducplaced. The upper end of the tube 7 is closed in, so as to confine the ball 6; but this turning in of the upper end is only partial, so that an opening 8 is left for the passage of the lower end of the filament 2.

In this Instead of locating the filament-tautening device within a guiding-tube I may reverse the arrangement, as shown in Fig. 2. In this case the tautening device or weight consists of a tube 9, the upper end of which is fastened to the lower end of the filament 10 and the lower portion of which loosely surrounds a glass ball or knob 11, lcarried bythe upper end of the leading-in wire 12. The tube 9 and the ball 11 are so related as to permit a relative movement suiiicientto compensate for expansion and contraction of the filament 10. A flexible current-carrying conductor 13 electrically connects the filament and leading-in conductor 12.

What I claim as new, and desire to secure by Letters Patent of the United States, is-

1. The combination of a tube or container, a filament supported at one end from the tube, a weight attached to the opposite end of the filament and serving to apply a uniform tension to the filament, and a guide surrounding said weight.

2. The combination of a tube or container, a filament supported at one end from the tube, and a weight attached to the opposite end of the filament and serving to apply a uniform tension to the filament, and a guide for said In witness whereofI have hereunto set my hand this 15th day of March, 1904.

ALMON D. PAGE.kl

Witnesses:

S. N. WHITEHEAD, JOHN E. MITCHELL, Jr. 

